Sion weather in December (Canton of Valais, Switzerland)

This month is known to be a cold month. The average maximum daytime temperature in Sion in December lies at -0.7°C (30.74°F). The average minimum temperature goes down to around -6.1°C (21.02°F) (often the minimum temperature is noted at night).

December is part of the rainy season with an average precipitation of 171mm (6.7 inches). There are generally around 15 snowy days. You will hardly see any sun, with only 70 hours of sunshine during the entire month.


Sion, monthly averages in December

Show in Fahrenheit
Min Temperature -6 °C  
Max Temperature 0 °C  
Chance of Rain 52%  
Precipitation 171mm  
Rainy days 16 days  
Humidity 83% *  
Sunshine 70 hrs *  
Percentage Sunshine 50% *  

Where to stay in Sion

Where to go in Switzerland in December

Find out more about the weather in Switzerland in December and which places have the best weather conditions in this month.

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in December? Visitors traveling to Sion should plan on bringing winter clothes, snow boots and a warm winter coat since there will be many periods of snow.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Sion.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Switzerland? On this website you can find historical weather averages for many cities in Switzerland. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.